Hach TitraLab Basic User Manual page 13

Startup
Switch on the instrument
Become familiar with the instrument functions before operation. Learn
how to navigate through the menu and perform the relevant functions.
1. Connect the input connector of the power supply to the POWER IN
port on the back of the TitraLab.
2. Connect the power supply to a power socket.
3. Press ON/OFF below the display to switch on the instrument.
4. The instrument performs a self-test upon each activation.
Note: Wait approximately 20 seconds before switching on again so as
not to damage the electronics and mechanics of the instrument
Start up
Language selection and data output setting
The titrator software supports multiple languages. The first time the
instrument is switched on, a language selection list is displayed
automatically upon completion of the self-test.
1. Select the required language.
2. Press OK to confirm the selection.
3. Select the type of data output (deactivated, printer, computer) and
confirm with OK.
Change the language setting
The instrument functions in the selected language until the option is
changed.
1. Turn the instrument on.
2. Select SYSTEM > LANGUAGE.
3. Select the required language.
4. Press OK to confirm the selection.
Analysis of free SO
2
1. Dispense 10 mL of the sample into a titration cell.
Note: If the sample is shaken or filtered, the readings will be lower.
Note: Work with a sample and room temperature of (20 °C [70 °F]).
Higher temperatures lead to higher readings; lower temperatures
lead to lower readings.
2. Obtain just enough solid potassium iodide (KI) to cover the tip of a
spoon (approximately 0.2 g) and add to the titration cell.
3. Add a magnetic stirring bar and attach the titration cell to the
magnetic stirrer.
4. Lower the electrode into the titration cell until the "FREE" mark on
the electrode is flush with the top edge of the titration cell.
Note: Make sure that the electrode cannot be damaged by the
stirring bar or come into contact with the bottom of the titration cell.
Make sure that the electrode wires are covered by sample.
5. Select ANALYZE FREE SO2. "INSERT SAMPLE: 1" is shown on
the display.
6. Select START ANALYSIS.
The following steps are carried out automatically by TitraLab:
• Acid is dispensed into the titration cell for 1 second
• Titration is then started
7. The result is shown on the display and, depending on the setting,
sent to a printer or computer.
8. Press OK to confirm the result.
9. To begin another analysis, select OK. "NEXT SAMPLE" is shown
on the display.
English 13